He's won the Ballond'Or, awarded to the world's best player, four years in a row on top of his laundry list of other awards and achievements.

Because of his exploits, Messi is the topic of heated discussion surrounding the profound question of who is the greatest player ever. Many argue that Messi's talent is unrivaled historically—even by Pele or Maradona—while others point to the one thing missing from Messi's trophy case: the World Cup.

Watch the video to find out why Messi must win the 2014 FIFA World Cup to cement his legacy as one of the greatest of all time.